Ventilator



Patented Apr. 11, 1922.

2 SHEETS SHEET I- 5mm '6 5', 1i!

- zillllll' hrro/iwfn L. w. NICHOLS AND w. LEEDY;

VENTILATOB. 'APPLICATION FILED IULYIB. m9.

Patented Apr; 11,1922

rinolitwnrcfions Ann swe tener, Qt YOUNGSTOWN, oHIo.

T 0 allwhmc't may concern:

Be it"known thatbwe, LEoN'VV. NICHOLS -and' VALTER LEEDY, citizens of the United States, residing at, Youngstown, in the county of Mahoning and State of'Ohio, have invented certain new and useful Improvementsin Ventilators, of which the following is a specification. y

LThis invention relates tolventi-lators, prin cipally of that type "which'is i'otatably mounted uponthe top of an air stack or shaft, thew-object being to provide a contrivance which will avoid all back draft while the structure is adjusting itself to changes in the direction of the wind, thus preventing any downward rush of foul air, smoke or other substance, caused by the blowing of the wind in the rear-or discharge end of the ventilator during the time in which the structure is revolving in response to the changing currents of the air or direction of the wind. A

Figure 1 is a perspective view of our invention; Figure 2 is a vertical longitudinal section; Figure 3 is a horizontal longitudinal section on line 33 Figure 2; Figure 4 is a horizontal transverse section on line 44 Figure 2; Figure 5 is a fragmentary View, partially in section, showing the closing weight bars attached to the louvers.

a represents the base of the structure which is rigidly secured to the upper end ofthe ventilator shaft, and is provided with the flaring flange shield or cowl b. 0-0 are cross bars rigidly secured within the base a, there being an upper and a lower series of the same. At the intersection of the lower series of said cross bars is the bearing block d having a central opening,rwhile at the intersection of the upper series is the bearing block 6 having a central opening,

and also provided in its upper face with the ball-racel f. Rigidly mounted in the bearing blocks (Z and e is a perpendicular spindle g which extends the full height of the structure. h representsthe lower part of the rotating portion of the structure andis provided with a flaring flangeshield or cowl i, and also with a cross bar j. To thecenter of the cross bar is'secured the bearing block In, having a. central opening, and being recessed in its lower face, thus providing'an outer flange or wall to embrace the bearing block 6 with the ball-race in its upper face. Z represents the top, m the bottom and H the sides of the upper portion of the struc- Application filed Jilly 16,1 19. sen-alive. pairsias. 7

VHELNTILVATOR.

"Specification of Iietters Patent. Patented APIZ'II, 1922.

tune; At the front-end of this open frame work is a triangular body 0, rigidly vsecured 111 spaced relation'witl the slides 71-1 and with its apex extending out beyond the frame work; Secured to the 'inn 'r face' 0f 'the'fytop Z is the, bearing v vblock having a conicalybearing recess in its lower face to receive the upperend Joft'hespindl'e g.

'-'-At the rear or dischar e end of the struc- 'ture-we arovide a series of blades or louvers gg, swingingl'y mounted at their upper edges (as at r) to the sides -m; e

To the'insid'e of each one of'tlie louver s', we attach a counter weight s of sulficient "weight to'hold the louver normally open, preferably at anangle of aboutforty}five degrees'. v

'A vane t is secured to the top "ofthe structure to cause it to revolve as the course or direction of the wind chan es. The entire rotatable portion of the device is'mounted upon the base a by passing the ing block is, the upper end of the bearing block 6, with the ball-race in itsupper face, registering in the recess in the lower face spindle 9 through the opening in the bear of block is, while the upper end of the spindle g engages the conlcal recess inthe,

lower face of the block pattached to the inside of the top Z.

and object-of our device is to As already stated, the primary purpose provide means currents" through the ventilator, and theoperation of ourdevice is as follows:

When the structure is adjusted line the wind the airenters V with the direction of at the front end between the triangular body 0 and the sides vie-n, passing over the ventilatorshaft and out at-the rearend be which, 'as already tween the louvers q,

stated,- are held open by counter-weights s-s, carrying with it the foul-and obnox ious air and gases drawn air shaft bythe current passlng overit;

upwardly from the; 3

' 1100 Upon any sudden-change in the direction of the wind, however, or when eddiesor contrary currents-of air occur, causing the V 7 air to blow against the rear end of the structure, the louvers are forced downwardly to aclosed.position against the re sistance 0f 7, the counter-weights ss, thus is preventing any back draft or rear-ward movement of the air through the ventilator,

which inevitably drives the foul and poisoned air down theventilating shaft.

When the structure has shifted in response to the change of the wind the current against the louvers will cease, when they will be raised to their open position by the counter-weights.

\Ve claim- 1. In a device of the character described,

a casing open at both ends rotatably mountcasing, and at its discharge end with one or more swingingly mounted louvers adapted to be held normally open, but to be automatically closed by any reverse current approaching the discharge end.

3 In a device of the character described, a casing open at both ends rotatably mounted upon a ventilator shaft, and provided at its discharge end with one or more swingingly' mounted louvers, each of said louvers being provided with a counter-balance to hold it normally open, but adapted to be antomatically closed by any reverse current approaching the discharge end.

4. In a device of the character described, a .casingopenat both ends rotatably mount ed upon a ventilator shaft, and provided at its intake end with .a triangular body in spaced relation with the sides of said casing,

and at its discharge end with one or more swingingly mounted louvers, each of said louvers being provided with a counterweight to hold it normally open, but adaptcd to be automatically closed by any reverse current approaching the discharge end.

In testimony whereof we hereunto aflix nesses.

LEON W. NICHOLS. WALTER LEEDY. v

Witnesses: V PATTY DE VANEY, WV. Y. WILLIAMS.

our signatures in the presence of two'wit- 45 

